Concrete floor construction.



M. s. GOLDSMITH. CONCRETE FLOOR CONSTRUCTION.

APPLICATION F lLED OCT-81. 1914.

Patented Jan. 18,1916.

a t is. eoLnsMITII, or CINCINNATI, OHIO.

CONCRETE FLOOR CONSTRUCTION. i

specification of Letters Patent. Patented Jan, 18, 1916.

Application filed October 31, 1914. Serial No. 869,508.

To all whom it may concern Be it known that 1, -MAX S. GOYILDSMITHLI'crete Floor Constructions, of which the following is a specification.

-My invention relates to concrete floor constructions, in assemblingwhich arched metal forms are placed in rows upon centering, leavingbetween them longitudinal troughs, into which concrete is poured to formconcrete beams, and over which concrete is poured to form concrete floorslabs,

andon which a ceiling is formed by metal laths suspended from theconcrete beams,-

and covered with plaster.

An object of my invention is to provide a means for preventing thearched forms from flattening or spreading;

Another object of my invention is to provide means for preventing waterseeping from the wet concrete.

Another object of my invention isto provide a convenient means forsuspending the metal laths between the concrete beams.

Another object of my invention is to provide a convenient means foralining the arched forms.

These and other objects are attained by the means described in thespecification, and illustrated in the accompanying drawings, in which,

Figure 1 is a perspective view of a floor embodying my invention, in"thecourse of construction, parts thereof being broken out, more clearlyto illustrate the invention. Fig. 2 is a perspective view of a metallath forming a feature of my invention. Fig. 3 i a sectional view, takenupon irregular the 33 of Fig. 4. Fig. 4 is a sectional view taken alongline 44 of Fig. 1. Fig. 5 is a sectional view upon an enlarged scale,showing a part of a concrete beam, and the ends of a metal lath and anarched form.

In constructing a floor embodying my invention, a series of metal lathsA, each lath having its ends a, a upturned, are supported at their endsupon centering boards B, which are mounted upon struts D. The metallaths are placed in rows, side'by side. There is left between theupturned ends of the laths of adjacent rows, a space which is of a widthequal to the lower end of the concrete beam which isto be formed. Thedistance between'the ends-e, e of the arched forms E is equal to thedistance between the upturned ends a, a of a lath A. The arched forms Eare placed upon the metal laths, so

that between the ends of adjacent rows of the arched forms, there is atrough, which molds the concrete into the shape ofabeam,

the ends e, e of adjacent rows of the arched forms constituting thesides of the mold for the beam and the centering B, forming the bottomof the mold. Within the troughs reinforcing rods F, F', are placed inthe usual manner, before the concrete is poured therein.v The tops ofthe arched forms E form a continuous horizontal support for the concreteof the floor slabs.

I will now describe the construction of the metal laths and of thearched forms in detail: Each metal lath A consists of a rectangularpiece of sheet metal, in which longitudinal ribs a areformed, between.inverted truncate of a triangle, and their ends, occurring in theupturned ends a a,

are flattened to close them. This forms in the ends pockets aflwhich areopen at the bottom and closed at the top. Adjacent to the ends a a/ ribsa and flanges a are flattened to the level of the body of the sheet,

thereby forming transverse grooves 41, 0., adjacent to said ends. Thearched forms E are made preferably from sheet metal,

which is longitudinally corrugated. The angle at which the ends 6 estand to the body of the-arched form approximates a right angle. Whenthe arched forms are positioned upon the metal laths, the ends of thearched forms rest in the grooves a? a,

abutting at their lower ends against the ends a a. This contact of theends 6 e with the ends a a. of a lath braces the arched form, so that itwill not flatten when weight is brought to bear uponit. The bottom andside walls of the grooves (Z5 a form a close contact with the loweredges ofthe' ends e 6, so that when concreteis poured into the troughs,this close contact prevents seepage of the water from the concrete andhence prevents that honey-comb efiect, which is found in concrete fromwhich water has seeped to such an extent as not to leave a sufiicientamount of water of crystallization therefor.

- The Wet concrete is forced by the weight I 'of the superposed concreteinto the pockets a and likewise through the perforations in the upturnedends a (1. ,Hence when the concrete has set, the concrete in the pocketsand these aforesaid perforations, iorrns a support for the metal lathsA, which will maintain them firmly in place when the centering B hasbeen removed. This means of supporting the metal laths saves bothinaterial and. labor, over those constructions wherein the lath issuspended from the molds by means of wires. 4

What Iclaim is: I c 1. In a concrete floor .in the course ofconstruction, the combination of a series of parallel centering boardsspaced apart a distance equal to the distance apart of the beams to beformed, a series of metal laths, each lath having upturned ends, each ofthe series consisting of a row of laths with the upturned ends inalinement, resting upon the centering boards, and with a space betweenthe rows equal to the width of the lower end-of the concrete beam whichis to, be formed, a series of arched forms with downturned ends, each ofthe series of arched forms being supported upon one of the series oflaths,and each form. having its ends contactingcwith the upturned endsof I its'supporting lath, and concrete supported upon the arched forms,filling in the space between the ends of thelaths and embedding theupturned ends of the laths. 2. In a concrete floor, the combinatlon of aseries of metal laths laid with a space between each series of a widthequal to the 7 lower end of.the concrete beam-which is to be formed,each lath having in it a series of longitudinal upwardly projectingdove-tailed ribs, its'ends upturned and the ribs flat ed upon one of theseries of laths, and each form having its ends contacting with theupturned ends of its supporting lath, and

concrete supported upon the arched forms,

filling in the space between the ends of the,

the upturned ends to form transverse grooves in the lath, a series ofarched forms with downturne'd ends, each of the series of arched formsbeing supported upon one of the series of laths, and each form havingits ends con-1 tacting with the upturned ends of its supporting lath,and concrete supported upon the arched forms, filling in the space betweenthe ends of the laths and embedding the upturned ends of the laths.

lfIn, concrete floor inthe course of con struction, the combination of'a series of -'parallel centering boards spaced apart a distance equalto the distance apart of the beams to be formed, a series of metallaths,"

each lath having upturned perforated ends, each-of the series consistingof a row of laths with the upturned ends in alinement, resting upon thecentering boards, and with a space between the rows equal to the widthof the lower end of the concrete beam'which' arched forms beingsupported upon one of i the series of laths, and each form having itsends contacting with the upturned ends of its supporting lath, andconcrete supported upon the arched form, filling in the space betweenthe endsof the laths, embedding the upturned ends of the laths, andprojecting 1 through the perforations.

5. As a new article of manufacture, a rmetal, lath having longitudinalribs, up-

turned ends, and the ribs flattened adjacent to the upturned ends toform transverse grooves in the lath.

. 6. As anew article of manufacture, ametal lath having upturnedends,longitudinal ribs which are closed at the ends of the laths and areflattened adjacent to the upturned endsto form transverse rooves.

J 7. In a concrete oor, the combination of a series of metal laths, eachlath having upturned ends adapted to'brace a superposed arch formagainst the weight of concrete supported by the form, each of the seriesconsisting of a row of laths with the upturned ends in alinement andwith a space between the rows equal to the width of the lower end of theconcrete beam which is'to be formed, a series of arched forms withdownturned ends, each 'of' the series of arched forms being supportedupon one of the series of laths, and each form having its In testimonywhereof, I have hereunto ends contacting with and braced bytheupsubscribed my name this 29th day of Octoturned ends of itssupporting lath, and conber, 1914.

crete supported upon the arched form's, fi11- MAX S. GOLDSMITH. 5 ing inthe space between the ends of the. Witnesses: 4 A

laths and embedding the upturned ends of WALTER F. MURRAY,

the laths. p W. THORNTON BOGERT.

